Quincey,
Thanks. I’m using Xcode Version 6.4 (6E35b). Mac running 10.10.4. Programming
in Swift 1.2.
Here is the mouse-down method with event loop. As you can see I am calling
setFrameOrigin in the dragging case and setting frame directly in the resizing
case.
override func mouseDown (event: NSEvent) {
var resizing = false
var dragging = false
let clickLocation = convertPoint(event.locationInWindow, fromView: nil)
if resizePath.containsPoint(clickLocation) { resizing = true }
else { dragging = true }
// Remain in an event loop until left mouse up.
let mask = NSEventMask.LeftMouseUpMask |
NSEventMask.LeftMouseDraggedMask
var lastDragLocation = superview!.convertPoint(event.locationInWindow,
fromView: nil)
while resizing || dragging {
let event = window!.nextEventMatchingMask(Int(mask.rawValue))
if event == nil { continue }
if event!.type == NSEventType.LeftMouseUp {
resizing = false
dragging = false
} else if event!.type == NSEventType.LeftMouseDragged {
let dragLocation =
superview!.convertPoint(event!.locationInWindow, fromView: nil)
if dragging {
var origin = frame.origin
origin.x += dragLocation.x - lastDragLocation.x
origin.y += dragLocation.y - lastDragLocation.y
setFrameOrigin(origin)
needsDisplay = true
} else if resizing {
var origin = frame.origin
var size = frame.size
origin.y += dragLocation.y - lastDragLocation.y
size.height -= dragLocation.y - lastDragLocation.y
size.width += dragLocation.x - lastDragLocation.x
frame = CGRect(origin: origin, size: size)
needsLayout = true
needsDisplay = true
}
lastDragLocation = dragLocation
}
}
Tom Wetmore
> On Jul 20, 2015, at 4:43 PM, Quincey Morris
> <quinceymor...@rivergatesoftware.com> wrote:
>
> On Jul 20, 2015, at 13:30 , Thomas Wetmore <t...@verizon.net> wrote:
>>
>> When I instantiate one of these views and place it in an NSWindow, I can
>> drag it around and I can resize it, as expected. Notably, however, I can
>> resize it down to zero size (and even smaller!), even though the two
>> constraints exist. I kind of expected the program to crash when the
>> constraints were violated, but things keep on running. I can drag and resize
>> the view at will with no repercussions.
>
> a. What version of Xcode are you using?
>
> b. What mechanism are you using (inside the mouse-down event loop) to change
> the size?
>
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